HI,
not from .htaccess
from this file: /home/storage/cache/c1/c1ef03ef351d2b3bb4c3088ddc3caeadc2b95ed837f2df7a6136ba0e350ec75c.php on line 82
Some extension cause this problem where are some formula with division.

Cheers

Custom OpenCart modules and solutions. Just PM me... Extensions you can find here and here